Digital Electronics
Auburn University | Fall 2022
Dr. Guofu Niu
Digital Keypad
Many electronic systems have the nature of a finite state machine (FSM). These are systems in which a desired output results from a certain sequence of inputs. For example, pressing a certain code on a keypad causes a door to unlock.
In this project, you will design a FSM that will turn on a fan and light when the correct code is entered, but will sound an alarm if the incorrect code is entered.
This is a design project. One consequence of this is that there is no one right solution. There are various ways to achieve the desired result, and you will need to decide on your own how to proceed. For example, you may use a BJT or a MOSFET to turn on a fan. Either one is acceptable, but once you choose, other aspects of the design will be affected.
Basic Digital Logic Circuits
The purpose of this experiment is to review the basic principles of digital logic and it’s uses as they apply to digital logic circuits. This lab also teaches the student proper usage of the ELVIS workstation, which will be used throughout their education.
Simulation of Electric Circuits
The purpose of this experiment is to familiarize the student with the mutism software, and
it’s uses as they apply to logic circuits. The self-paced nature of this particular lab allows the student to fully explore and understand the material being worked with.
Medium Scale Integrated Circuits
The purpose of this experiment is to familiarize the student with simple medium scale integrated logic circuits. The student will learn to use decoders, demultiplexers, output selectors, multiplexers, and output selectors. Additionally,
Binary Arithmetic Circuits
The purpose of this experiment is to review the student on the principles of binary arithmetic and the use of circuits for binary addition. Additionally, through performing this experiment, the student should further enhance their professional communication skills.
Diodes and Rectifiers
The purpose of this experiment is to provide an introduction to diodes using the Elvis II
workstation. The student will be able to review the basic principles of diodes, understand diode rectifier circuits, and gain experience with the Elvis breadboarding system and
oscilloscope.
BJT Transistors
The purpose of this experiment is to provide an introduction to the real world characteristics of BJTs and their applications. The student will be able to measure BJT characteristics, construct inverter circuits, and use BJTs to turn on a large current with a small
voltage.
Freespace Optical Communication Link
The purpose of this experiment is to provide an opportunity to experiment with optical communication links and their applications. The student will be able to familiarize themselves with components such as: IR LEds, photo transistors, AM IR links, FM IR links.
MOSFETs and CMOS Inverter
The purpose of this experiment is to learn to measure threshold voltages and Ids-Vgs values, create an understanding of MOSFET switching circuits, build a CMOS inverter, and experiment with overclocking and underclocking.
CMOS Logic Circuits
The purpose of this experiment is to reinforce the basic principles of CMOS logic, gain
experience with complex CMOS gates, and learn how to construct CMOS transmission gates.
Additionally, the student will continue to refine their professional communication skills
through report writing.
Amplifiers
The purpose of this experiment is to learn how to use MOSFET as an amplifier, gain
experience designing amplifier bias networks, provide a review of bode plots, and observe
the spectra of different signals. Additionally, the student will continue to refine their written communication skills.